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matrix manipulation : ind of wanted rows and columns stocked in a vector
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Dear all, for a square matrix is it possible to get only the the first and the third (not the second) rows and columns : the wanted are stocked in a B vector
A =
35 6 19
3 7 23
31 2 27
B = (1 3)
C = function (A, B)
C =
35 19
31 27
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David Goodmanson
el 7 de Abr. de 2017
Editada: David Goodmanson
el 7 de Abr. de 2017
Hi Lila, you just have to make an index vector:
B = [1 3];
C = A(B,B)
The row index is the first listed and the column index is second, and these can be independent:
>> A = magic(5)
A = 17 24 1 8 15
23 5 7 14 16
4 6 13 20 22
10 12 19 21 3
11 18 25 2 9
>> C = A([1 3 4],[3 5])
C = 1 15
13 22
19 3
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